Cylinder block plate processing apparatus and sealing mechanism of the same

Abstract

A cylinder block plate processing apparatus in which one end side of an inner peripheral surface of a cylinder of a cylinder block is sealed to circulate a process liquid to perform pre-plating or plating processing of the cylinder inner peripheral surface. The apparatus includes: an apparatus body having a workpiece mount table on which the cylinder block is placed; a workpiece holding tool that is provided on the workpiece mount table so as to be vertically movable; an electrode support member including an electrode cylinder mounted to the apparatus body; a processing solution supply member that supplies a processing solution to the electrode support member; an electrode operated by the electrode cylinder; a sealing jig provided to one end of the electrode; a driving mechanism that drives the sealing jig; and a control circuit that controls operations of the processing solution supply member and the driving mechanism.

Description

TECHNICAL FIELD[0001]The present invention relates to a cylinder block plate processing apparatus (or merely plating apparatus), and more particularly, to a cylinder block plate processing apparatus that seals one end side of an inner peripheral surface of a cylinder of a cylinder block to circulate a process (treatment) liquid and performs pre-plate processing or treatment or plate processing of the cylinder inner peripheral surface, and also relates to a sealing mechanism thereof.BACKGROUND ART[0002]Conventionally, there is disclosed a cylinder block plate processing apparatus for sealing one end side (crankcase surface side) of an inner peripheral surface of a cylinder of a cylinder block to circulate a process liquid, and performs pre-plate processing or plate processing of the cylinder inner peripheral surface (for example, Japanese Patent Laid-Open Publication No. 8-74095: Patent Document 1). This conventional example describes an apparatus in which a balloon-shaped sealing me...

AI Technical Summary

Benefits of technology

This approach ensures reliable sealing of the cylinder inner peripheral surface, even with complex shapes, by minimizing the size change of the sealing member and maintaining high sealing accuracy, while also extending the life of the sealing member.

Problems solved by technology

When plate processing to such a cylinder block is performed, if a sealing member is to be inserted from the crankcase surface side, the sealing member interferes with the crank journal, and thus, a shape thereof is significantly limited and becomes complex.

When the sealing member is inserted from the crankcase surface side into the cylinder so as to avoid the crank journal so as to seal thereafter the entire cylinder inner peripheral surface, an amount or rate of size change in expansion / contraction of the sealing member becomes excessive, and then, the sealing accuracy of the sealing member is reduced, and the cylinder inner peripheral surface cannot be reliably sealed.

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